Iran’s envoy to the United Nations’ atomic agency says the Israeli regime has hired hit men to assassinate nuclear scientists all over the Middle East, and yet, continues to receive nuclear cooperation from certain countries.

Reza Najafi, who represents Iran at the International Atomic Energy Agency (IAEA), made the remarks on Thursday, addressing a quarterly IAEA Board of Governors’ meeting.

"While nuclear scientists across the entire Middle East have been assassinated by Israeli-hired terrorists, the regime’s nuclear experts are allowed access to some countries’ nuclear facilities,” he said, without naming those countries.

Four Iranian nuclear scientists were assassinated by the Israeli regime between 2010 and 2012. Iran has incriminated the IAEA for leaking information about the four scientists to the Israeli regime.

Najafi strongly condemned the Western states for their disregard for the standing international laws of nuclear non-proliferation, which prohibit all types of nuclear cooperation with Israel and the transfer of nuclear materials and equipment to the entity.

Israel, which has refused to sign the nuclear Non-Proliferation Treaty (NPT) or allow inspections of its military nuclear facilities, keeps an estimated stockpile of some 200-400 nuclear warheads, making it the sole nuclear-armed party in the Middle East. Leaked emails from former US secretary of state Colin Powell have also confirmed the Israeli regime’s possession of nuclear weapons.

Najafi called the nuclear capability held by Israel, which has a history riddled with invasion, occupation, and state terrorism, a threat to international peace and security.

Also speaking at the IAEA Board of Governors’ meeting on behalf of the agency’s Arab members, Hamad Al Kabbi, the Emirati IAEA envoy, blasted some Western states’ support for Israel’s nuclear program.

Al Kabbi also blamed the West for the failure of the 2015 Review Conference of the Parties to the NPT to adopt a final document aimed at achieving a Middle East free of nuclear weapons.

The American and the European Union’s missions to the agency were reportedly irked by the regional countries for bringing up the issue and attacking Israel.

Separately on Thursday, Iranian nuclear chief Ali Akbar Salehi addressed the issue of the country’s current cooperation with the IAEA.

"We perceive the outlook of Iran’s cooperation with the agency in the new era to be a positive outlook,” he said, referring to the period of enhanced cooperation following a 2015 nuclear deal between Iran and six world powers. "Our cooperation with the agency has been defined within a framework.”

Salehi said the Islamic Republic had made all efforts to stay true to the obligations it has committed itself to under the deal. "We have had very good cooperation with the agency to date. We hope for this trend to continue.”

However, he said that while delivering on its obligations, Iran has acted to cement its rights in the face of the requests that have exceeded the framework.

The IAEA has been tasked with monitoring the technical aspects of the deal, known as the Joint Comprehensive Plan of Action (JCPOA). So far, it has invariably verified the Islamic Republic’s commitment to its contractual obligations.